35 research outputs found

    Research and realization of coding/multiplexing and demultiplexing/decoding for TD-HSPA’s terminal test set

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    随着无线数据的业务量不断增长,移动通信系统对传输速率和系统容量的需求也急剧增加。TD-HSPA系统作为TD-SCDMA技术的演进,支持高速传输,同时满足不同速率和质量要求的业务复用,也为更高的数据速率和更高容量提供了一条平稳演进的途径,成为目前TD-SCDMA研究的热点问题。开发TD-HSPA终端综合测试仪,及深入研究TD-HSPA系统传输信道编码复用和解复用译码技术,对保障TD-SCDMA产业链的完整、提升产业化的可靠性和竞争优势有重要意义。 本文在全面阐述TD-HSPA终端综合测试仪的基本原理和软、硬件基本结构基础上,对TD-HSPA系统编码复用和解复用译码技术进行深入研究,比较完善地设...With the rapid growth of wireless communication services, the demand for transmission rate and system capacity has increased drastically in the mobile communication system. As the evolution of TD-SCDMA technology, TD-HSPA system supports high-speed data transmission, provides an efficient way to multiplex several services with different rates and quality of service, and makes a smooth evolution...学位:工学硕士院系专业:信息科学与技术学院通信工程系_通信与信息系统学号:2332007115215

    Research and realization of wireless metropolitan area network for surveillance based on WebGIS

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    为了实现无线城域网监控(WMAnS)的透明化、可视化与实时互动化,研究了无线城域网监控系统的系统架构和功能,着重分析了系统实现的关键问题以及网络地理信息系统(WEbgIS)在系统的核心功能。再运用软件工程领域成熟的统一建模语言(uMl)设计系统软件模型,最后通过无线城域网传输gPS信息、语音和视频等数据,运用开源网络地理信息系统工程MAPguIdE OPEnSOurCE实现终端监控、终端调度、信息发布等功能。In order to establish a transparent, visible, real-time, and interactive wireless metropolitan area network for surveillance (WManS), the architecture and functionality of the system are studied at first.The key implementation issues and the core functions of WebGIS are then specially focused.The unified modeling language (UML) is utilized to design the system software model.By adopting the open source tool MapGuide Opensource, the GPS messages, audio, and video data are transmitted via wireless metropolitan area network.Finally, the system functions are implemented including monitoring, scheduling, and message distributing, etc.国家863高技术研究发展计划基金项目(2007AA01Z289);国家973重点基础研究发展计划基金项目(2007CB310608

    Study on Architecture and Unified Model of Urban Emergency Response System

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    根据我国对城市应急联动系统(uErS)建设的要求,遵循软件工程领域内成熟的模型语言规范,设计一个基于统一建模语言的uErS模型,包括决策指挥中心、应急联动中心、各联动单位的调度中心、联动单位的分支机构、处置力量部门和处置力量编组。该模型可以协助系统开发人员规范系统的开发与软件重用,优化系统结构,加快uErS的开发进度。In order to meet the development demand of Urban Emergency Response System(UERS) in China,this paper designs a UERS model based on Unified Model Language(UML),which follows the mature modeling language standard of software engineering.The UERS model includes a decision-making of emergency command center,an emergency responding coordination center,dispatching centers of all cooperative units,the sub-branches of the cooperative units,execution divisions and sub-divisions.It can assist the system developers to regulate the development and software reusability of the system,optimize the system architecture,and accelerate the development of UERS.贵州省科技厅基金资助项目(黔科合软.R字(2007)2004号

    Grazing pressure of microzooplankton on phytoplankton in Xiamen Waters

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    应用稀释法对厦门海域浮游植物生长率(k)和微型浮游动物的摄食率(g)进行了估算。结果显示:5月,西海域18测站k、g分别为2.41、0.78d 1;南部海域27测站分别为2.43、1.32d 1。8月18测站k、g分别为3.00、2.90d 1;27测站分别为1.94、0.91d 1。说明厦门海域作为典型的亚热带港湾,具有高的k、g值。分粒级研究结果显示:8月,18测站微型浮游动物对微型浮游植物(Micro)具摄食偏好;而27测站微型浮游动物对Micro和Nano级的摄食率相近。应用流式细胞技术研究18测站微微型真核浮游植物的k、g,结果表明:春季,生长率和摄食率分别为2.00、1.02d 1;夏季分别为1.52、0.96d 1。Phytoplankton growth rate and microzooplankton grazing rate were estimated in Xiamen Waters using dilution method. In spring, phytoplankton growth rate (k) and microzooplankton grazing rate (g) were 2.41d~(-1)0.78 d~(-1), respectively, at station 18, Western Xiamen Waters, and kg were 2.43 d~(-1)1.32 d~(-1), respectively, at station 27 which represents Southern Xiamen Waters. In spring, kg were 3.00 d~(-1)2.90 d~(-1), respectively, at station 18, kg were 1.94 d~(-1)0.91d~(-1), respectively, at station 27.It shown that Xiamen Waters is the typical subtrophical water with high kg values. Size-fractionated results show that in summer microzooplankton have a preferential grazing on microphytoplankton at station 18, but was not at station 27. Picoeukaryotes were counted by a flow cytometry before and after dilution incubation and kg values at station 18 were estimated (2.00) d~(-1)1.02 d~(-1) for spring and 1.52 d~(-1)0.96 d~(-1) for summer.国家重点基础研究发展规划(973)资助项目(G1999043706

    内脏牵拉反应的躯体性肌电变化规律

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    Size-fractionated phytoplankton biomass and productivity in the Zhujiang River Estuary in China

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    国家自然科学基金资助项目(4033100440076031);; 欧共体国际合作基金资助项目;; 教育部新世纪优秀人才支持计划资助项

    Phytoplankton Community Structure in the Transects across East China Sea and Northern South China Sea Determined by Analysis of HPLC Photosynthetic Pigment Signatures

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    应用高效液相色谱并结合二极管阵列检测器分析技术,研究了东海与南海北部典型断面浮游植物的光合色素组成,进而由CHEMTAX软件估算浮游植物群落结构。结果表明:东海断面浮游植物叶绿素a生物量大于南海北部断面。受海水层化结构影响,东海PN断面浮游植物群落结构形成上层和下层两种类型,上层以蓝藻为主要优势类群;下层以硅藻为主要优势类群。南海北部S断面浮游植物群落形成近岸与离岸两种类型,近岸以硅藻、隐藻、绿藻为主要优势类群;离岸以定鞭金藻、蓝藻、原绿球藻为主要优势类群。初步分析了研究海区浮游植物群落结构与环境因子的关系。 【英文摘要】 Phytoplankton samples from typical stations along the East China Sea and the northern south China sea were analyzed by RP-HPLC combined with DAD(diode array detector) to determine pigments composition.Ocean study included PN section along East China sea(September in 2002) and northern of south China sea(November in 2002).Pigments data were transformed into phytoplankton composition by software CHEMTAX based on least square method and steepest descent algorithm.This work showed that phytoplankton communities...国家自然科学基金创新群体项目“南海生物地球化学过程与机制”(编号:40521003);; 国家自然科学基金项目“特征光合色素对海洋初级生产过程的指示作用研究”(编号:40331004);; 国家重点基础研究发展计划项目“我国近海生态系统食物产出的关键过程及其可持续机理”(编号:2006CB400604)资

    Unmanned underwater robot for preventing suction air feedback type oil box

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    本发明属于以柴油机为动力的无人水下机器人领域,具体地说是一种无人水下机器人用防吸空反馈式油箱,包括箱体、安全阀、通气电磁阀、出油电磁阀、翻板式单向阀、液位计及进油电磁阀,箱体内部分为集油空间及位于集油空间周围的储油空间,集油空间与周围储油空间之间的侧壁上开有多个只能向集油空间内部开启的翻板式单向阀;集油空间安装有出油电磁阀,储油空间分别安装有安全阀、通气电磁阀及进油电磁阀,集油空间及储油空间均安装有液位计;储油空间内的油液在无人水下机器人纵倾或横摇时由翻板式单向阀流入集油空间内,集油空间内柴油机的出油管的出油口始终位于油液以下。本发明有效解决了无人水下机器的吸空问题,结构紧凑,空间利用率高。</p

    Distribution characteristics of size-fractionated chlorophyll a in Xiamen waters

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    据2002年12月至2004年2月间厦门海域6个航次分粒级叶绿素a含量的调查资料,研究了该海域分粒级浮游植物叶绿素a含量的分布特征及其控制因子.结果表明:厦门海域叶绿素a含量平均值为5.36mg/m3,各调查月份中,8月份的含量最高(13.6mg/m3),5月的次之(5.33mg/m3),12、2月的含量较低.叶绿素a含量的水平分布在冬季时较为均匀;春、夏季在宝珠屿海域出现最高值(33.28mg/m3),九龙江口外出现次高值(13.84mg/m3).厦门海域全年以微型浮游植物占优势,小型浮游植物在夏季高生物量时占比较高(41.O%),微微型浮游植物所占比例较小(年平均值为9.7%).冬季低温是浮游植物生长的主要限制因子,春、夏季随着温度升高,营养盐的缺乏限制了浮游植物的生长. 【英文摘要】 The distribution characteristics and seasonal variations of size-fractionated chlorophyll a in Xiamen waters were investigated by six cruises in Dec. 2002; Mar. , May, Aug. , Dec. 2003 and Feb. 2004 respectively. The annual average concentration of Chl-a was 5. 36 mg/m3. During the investigations, Chl-a concentration was highest in summer, lower in spring and lowest in winter. The horizontal distribution of Chl-a in our study area was even in winter, while in spring and summer there were two high value area...国家自然科学基金资助项目(40346043、40331004) 教育部新世纪优秀人才基金资助项
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